Hydraulic
System
Rev. E
Reelmaster 6500-D/6700-D Hydraulic SystemPage 4 - 67
Inspection
1. Check the condition of the needle bearing (12) in
backplate (8) and replace if necessary.
2. Inspect valve plate (13)on thebronze s ide nextto the
piston block for wear. A smooth surface is required. Do
not lap valve plate bronze surface. Replace valve
plate if any wear exists.
3. Inspect the piston block s urface that makes contact
withvalve plate.This surface should be smooth andfree
of deep scratches. Do not lap piston block.
4. The pistons should move freely in the piston block
bore. If they are sticky in the bore, examine the bore for
scoring or contamination.
5. Examine the O.D. of the pistons for finish condition.
They should not show wear or deep scratches. Inspect
the shoes for a snug fiton theball end of the pistons and
aflatsmoothsurfacethatcomes incontactwiththecam-
plate. Do not lap piston shoes.
6. Examine the spider for wear in the pivot area.
7. Examine the pivot toinsure smoothness and nosigns
of wear.
8. The polished finish on the shoe surface of the cam-
plate insert (11) should show no signs of scoring.
9. Inspect the shaft (3) for wear in the seal, bearing and
spline areas.
10. Inspect thrust bearing (6) and washers (5) for wear.
11. Check the condition of the needle bearing (17) in
housing (16) and replace if necessary.
Assembly (Fig. 38)
1. Cleanall parts in suitablesolventandlubricate all crit-
ical moving parts before reassembly.
2. If necessary, install new needle bearing (17) with
numbered end of the bearing outward.
3. Install retaining ring (4). Install thrust washer (5),
thrustbearing (6),and secondthrust washer (5).Secure
with second retaining ring (4).
4. Install shaft in housing. Install new shaft seal (2), and
retaining ring (1).
5. Installcamplate insert (15)with thelettering side ofin-
sert to the front of the housing. Use petroleum jelly to
hold in place during assembly.
0.173 in
(4.39 mm)
0.090 in
(2.30 mm)
Figure 39
6. Clamp motor assembly in a p rotected jaw vise with
the open end of the housing up.
7. If roll pins were removed, reinstall with opening of roll
pinorientedaway frombearing within5 degreesof bear-
ing center line (Fig. 39).
8. To replace bearing (12) in backplate, install bearing
withnumber end ofbearing facing up, nextto valve plate
(Fig. 39).
9. Apply small amountof petroleum jelly to the steelside
of valve plate (13) to hold in place for installation. Place
the valve plate in position onto the backplate with steel
side against backplate, and the bronze colored side
against piston block.
10. Placing new O-ring (9) onto backplate, place back-
plate assembly onto housing assembly. Make sure
valve plate stays in position.
11. Insert the cap screws (7) and tighten to 15 to 18 ft-
lbs. (20.3 to 24.4 Nm) in a criss-cross pattern.
12. Install the retaining rings, thrust washers, and drive
gear on the motor shaft.
Note: A one-way overrunning clutch is pressed into
theinner bore ofthe drive gear.Wheninstalling the drive
gear on the motor shaft, make sure the lettering on the
clutch faces the motor housing.
13. Place a new O-ring on the motor housing. Fill case
half full of hydraulic oil and install on vehicle.
